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Yesterday.ini: Difference between revisions
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It may be noticed that '''yesterday.ini''' is (apart from solar exception to be described below) simply duplicating information shown in the existing latest line in [[dayfile.txt]]. Consequently, if there is a rogue value within "yesterday.ini", the correction should actually be made to the latest line found in [[Amending dayfile|dayfile.txt]].
Refer to the [[today.ini]] page for full information on how Cumulus generates yesterday.ini from today.ini. Here we just make a few comparisons:
* See [[Average_temperature]] for one key transformation between '''today.ini''' and ''yesterday.ini''.
* Please note, no ET parameters are retained, plus there are some wind and some rain parameters not copied from '''today.ini''' to ''yesterday.ini''.
* NOTE: Yesterday's total rainfall from weather station is stored in '''today.ini''', but yesterday's total rainfall from [[Rain_measurement#Optical_Rain_Gauges|RG-11]] sensor is stored in ''yesterday.ini''.
The original purpose of introducing '''yesterday.ini''' was simply to provide an easier way for Cumulus 1 to display yesterday's extremes on its main screen. The file is re-created at each rollover time, and Cumulus 1 would only read the file when Cumulus is restarted and the main screen needed to be generated.
However, ''when version 1.9.0 added '''Sunshine Hours''' as field 25'' in "dayfile.txt", a new use of "yesterday.ini" emerged. Sunshine hours are counted from one minute past midnight to the subsequent midnight. For those using a 9 am or 10 am rollover, the sunshine hours count will be reset to zero during their meteorological day, this means somewhere is needed to hold the previous sunshine hour count, thus the [Solar] section was added to "yesterday.ini" as it holds what goes into the new line of "dayfile.txt" when rollover happens 9 or 10 hours later.
= Format of the file =
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